Improvement in portable ovens



G. w. mais.

' Portable Oven.A 1m-'34,7264 Patented Mamma. 1862.

Artnr FFICE.

GEORGE IV. AYRES, OF RAHWAY, NEWT JERSEY.

IMPROVEMENT IN PORTABLE ovENs.

Specication forming part of Letters Patent No. 34,726, dated March 18,1862.

To all whom it may concern:

Be it known that I, GEORGE W. AYRns, of the city of Rahway, in thecounty of Union and State of New Jersey, have invented a new andImproved Portable Bakers Oven; and I do hereby declare that thefollowing is afull and exact description thereof, reference being had tothe accompanying drawings and the letters and gures marked thereon, thesame being a part of this specification.

The nature of my invention consists in constructing a bakers oven ofsuch material and in such form and manner as to enable the user thereofto transport it from place to place on a vehicle and have it always inreadiness for use wherever an oven may be required.

To enable others skilled in the art of making and using bakers7 ovens tomake and use my improved oven, I will proceed to describe itsconstruction and operation.

The oven is constructed of sheet or plate iron of a thicknessproportionate to its size, plates one-sixteenth of an inch thickanswering for an oven capable of baking seventyve small loaves of breadat a time.

In the accompanying drawings, Figure l is a perspective View of the ovenas seen mounted on the vehicle ready for use. Fig. 2 is a view of thebottom of the apparatus with the furnaces mounted thereon; and Fig. 3 isa cross-section showing the arrangement of the shell, or rather thevarious shells, surrounding the baking-space of the oven.

It is constructed as follows: Abottom plate O O, Fig. 2, is firstprepared, of the proper length and, width, and upon this is mounted thetwo furnaces S S. They are made to eX- tend nearly across the width ofthe bottom. The sides of the furnaces facing each other are perforatedwith holes, about two inches in diameter, through which the flame passesinto the space between them. This space is divided diagonally by theplate R, said plate being as wide as the height of furnaces.

Now, supposing the above-described bottom plate to be eight feet longand five feet wide, then the oven proper inclosing the space K,Fig. 3,is made seven and a half feet long and four feet wide, and is setimmediately on the top of the two furnaces S S. Another shell is nowplaced over the shell of the oven, surrounding it on all sid es, exceptthe bottom and front, leaving a space about three inches wide all aroundbetween it and the open shell, as shown at Y Y, Fig. Through this spacethe draft passes to the smoke-stacks T T, and outside of this shellstill another is placed, leaving a space between to be filled with somenon-conducting material-such as sand or clay. The doorX is for thepurpose of cleaning soot and ashes from they space between the furnaces.The openings F F are for the purpose of filling the space I I betweenthe shells with sand, and the openings A A to allow the same to bedischarged to lighten the apparatus, and consequently to facilitatetransportation.

The operation of this oven is as follows: The lires being lighted in thefurnaces S S, the flame circulates first under the bottom of .the ovenand is there divided by the diagonal partition R, so that the flame fromone furnace passes up on one side of the oven and that from the otherfurnace onthe other to the smoke-stacks T T. This distribution of theiiame insures an even heating of the oven,which is indispensable to goodbaking. The bread to be baked is entered through the door M.

I claim-n 1. The arrangement of the shells of the oven forming the-flues and the space for the non-conducting material, the exterior shellhaving the openings, as described, for the putting in and taking out ofthe non-conduct-ing material, in combination with the furnaces anddiaphragm, as herein recited.

2. The arrangement of the furnaces, diaphragm, and dues, as set forth.

GEORGE W. AYRES.

Witnesses:

PATRICK CLARK, W. E. CLARK.

